/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.skatiger.jrove.tag.ui;

import java.io.IOException;

import javax.el.ELException;
import javax.el.VariableMapper;

import org.skatiger.jrove.JroveContext;
import org.skatiger.jrove.JroveException;
import org.skatiger.jrove.TagConfig;
import org.skatiger.jrove.TagHandler;
import org.skatiger.jrove.component.UIComponent;
import org.skatiger.jrove.el.VariableMapperWrapper;
import org.skatiger.jrove.tag.TagAttribute;
import org.skatiger.jrove.tag.TagAttributeException;

public final class IncludeHandler extends TagHandler {

    private final TagAttribute src;

    /**
     * @param config
     */
    public IncludeHandler(TagConfig config) {
        super(config);
        this.src = this.getRequiredAttribute("src");
    }

    public void apply(JroveContext ctx, UIComponent parent) throws IOException, JroveException, ELException {
        String path = this.src.getValue(ctx);
        if (path == null || path.length() == 0) {
            return;
        }
        VariableMapper orig = ctx.getVariableMapper();
        ctx.setVariableMapper(new VariableMapperWrapper(orig));
        try {
            this.nextHandler.apply(ctx, null);
            ctx.includeJrove(parent, path);
        } catch (IOException e) {
            throw new TagAttributeException(this.tag, this.src, "Invalid path : " + path);
        } finally {
            ctx.setVariableMapper(orig);
        }
    }
}
